Istdiana



L. GREENBERG.

MECHANICAL MOVEMENT.

APPHCATION FILEDSEPTJS, 1917- RENEWED JAN. 29, 1919.

1,317,365. PatentedSept. 30, 1919.

2 SHEETSSHEET 1.

Lama" 57663725639} a QM LOUIS GREENBERG, 0F HTDIANAPQLIS, INDIANA.

mnonalvrcan movnmnn'r.

Specification of Letters Patent.

Patented Sept. 30, 1919..

application filed September 15, 1917, Serial No. 191,518. Renewed January 29, 1919. Serial No. 273,880.

To all whom it may concern:

Be it known that I, LOUIS Gnnnxnnno, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented new and useful Improvements in Mechanical Movements, of which the following is a specification. 7

This invention relates to a 7 device embracing a novel mechanical movement.

Among the objects of my invention is to provide a mechanical movement wherein a member, slich as a search light or the like, may be revolved bodily about a vertical axis and simultaneously be tilted up and down in a vertical plane on a horizontal axis, or such member may be held in one or more fixed inclinations to and at the same time be turned bodily about a vertical axis, such movements being effected by positive mechanical means. It is a further object of my invention to provide a mechanical movement wherein said member, if a search light, will be made to project a ray of light at least onceon every point within the compass of its path of movement, so that thereis not a point within the compass of its movement that will not be illuminated by said light at least once during the operation of my device;

The invention consists further in the matters hereinafter described and more particularly pointed out in the appended claims.

In the accompanying drawings Figure 1 is a front elevational view of a search light equipped with a device embodying a mechanical movement constructed in accordance with m invention;

Fig. 2 is a verti al sectional view taken on the indirect line 22 of Fig. 1; and

Fig. 3 is an enlarged horizontal sectional view showing a detail of construction and taken on line 33 of Fig. 2. v

in the drawings I have shown a device embodying features of my invention and used in connection with a search light, but it is of course to be understood that my device may be put to other uses and that I have shown it'applied to a search light merely to illustrate its structural features and the manner in which it operates. As shown, said device com rises a base or supporting member 10, pre erably made in the form of a hollow housing or casing, cylindrical in. shape and having a bottom wall 11 and up-' right side or marginal walls 12. Located at the top of said casing and suitably secured thereto is an annular member 13, preferably in the form of a spider having radial arms or webs 14 horizontally disposed and extending between an outer rim in the form of an angle member 15 and a centrally arranged bearing member 16. Extending vertically through said member 16 are two hollow shafts or spindles 17 18, one journaled for rotation within the other and extending vertically above and below said member 16, as shown in Fig. 2. The outer shaft 17 is provided with a downwardly facing annular shoulder 19 adapted to bear on a washer 20 interposed between said shoulder and the member 16, for allowing the outer shaft to rest on said spider. The inner shaft 18 extends upward beyond the upper end of the outer shaft, and is provided with a downwardly facing annular shoulder 21 bearing on a washer 22 interposed between the said shoulder and the upper end of the outer shaft 17 for allowing the inner shaft to rest on the outer one, as shown in said Fig. 2. Said washers may be provided with antifriction bearing balls if desired. The upper end of said inner shaft is bifurcated or forked to receive a downwardly extending lug 23 provided centrally on a cross-arm 2 1. Said lug 23 is pivoted in said fork by a horizontally arranged pivot pin 25, which may be in the form of a screw-threaded bolt and nut, as shown in Fig. 1. The search light 26 is mounted on said cross-arm 24,

above the same, and is connected therewith by a yoke member 27, between the arms of which the casing of the search light is mounted, so as to be swung about a substantially horizontal axis. A clamp screw 28 secures the yoke 27 to the cross-arm 24, as shown in Fig. 2. Connected to that portion of the outer shaft 17 between the upper end of the inner shaft and the member 16, is an annular member 29, arranged concentric to said outer and inner shafts and having its upper edge in the shape of a wave like track30, upon which travel rollers 31, 31, carried by the cross-arm 24.

For rotating said inner and outer shafts 17, 18, I provide the following construction.

As shown in Fig. 2, the lower end of the inner shaft 18 extends downward below the corresponding end of the outer shaft 17 and has secured thereto a gear wheel 32 horizontally disposed, as shown, while to the lower end of the outer shaft 17 is secured a gear wheel 33, also horizontally disposed.

- Said gear wheels may or may not have the suitably secured to and supported by the bottom wall 11. The armature shaft 35 of said motor is horizontally arranged and has secured thereto a pinion 36 having worm teeth meshing with two worm wheels 37, 38, both horizontally disposed and on opposite sides of said pinion 36. Said worm wheels are secured to vertical shafts 39, 40 supported and journaled in the gear case 41 inclosing the worm wheels and meshing pinion, as shown. The shaft 39 is provided at its upper end with a gear pinion 42, which meshes with the gear wheel 32 on the inner shaft 18, while the shaft 40 is provided at its upper end with a gear pinion 43, which meshes with the gear wheel 33 on the outer shaft 17. Between each gear pinion 42, 43

and its associated shaft 39,40 is a slidable clutch member 44, 45 operated by suitable, shiftin levers 46, 47 fulcrumed intermediate t eir ends on the side walls 0 the easing 10 and having their handle portions extending outward therefrom through suit-' able vertical slots 48. The gear case 41 is supported within the outer casing 10 and above the bottom wall thereof on suitable sup orting members 49. V The operation of the device described and shown is as follows: When the motor 34 is set in motion by supplying current thereto from a suitable source, its armature shaft 35 is rotated and through the worm 36 serves to rotate the worm wheels 37 and 38 in opposite directions. Said worm wheels rotate the shafts 39, 40 vin opposite directions, and the latter, through'the gear plnions 42, 43, transmit motion through the gear wheel 32, 33 to the inner and outer shafts 18, .17,

respectively, when both clutch members 44, 45 are engaged with said gear pinions. Under such conditions, the inner shaft 18 is rotated in one direction and carries therewith the search light 26 and cross-arm 24, while the outer shaft 17 is rotated in the opposite direction and carries therewiththe wave-like track member 29. It follows, therefore, that the search light 26 is rotated bodily about a vertical axis and at the same time tilted up and down in a vertical plane on the horizontal pivot pin 25, as the rollers 31 on the cross-arm 24 travel over the now revolving wave-like track 30. Manifestly, .under such conditions, the search light will project a beam of light constantly up and down in a vertical plane while it is revolved bodily in a substantially horizontal plane. As shown in the drawings, the vertical shafts 39, 40 have the same diameter. while the same is true of the gear pinions 42, 43, but the worm wheels 37, 38 have dif:

ferent diameters, as shown. With respect to the gear wheels 32, 33, however, one islarger in diameter than the other and it follows that, When both clutch'members 44, 45 are in engagement with the gear pinions 42, 43, said shafts 17, 18 are rotated at different rates of speed, although in opposite directions. The result is that the wave-like track member 29 is rotated at a diiferent rate of speed than the search light 26 and its cross-arm 24. Therefore, the search light, in the operation of my device under the conditions stated, will reject a beam of light on every point within the compass of its path of movement, but no one point will be illuminated twice in succession. This may be more clearly understood by noting the following: As shown in the drawings, the wave-like track 30 has a plurality of crowns or high parts and a like number of depressions or low parts, and with a crown diametrically opposite a depression. Thus the search light 26 will be tilted upward to the fullest extent a plurality of times and be tilted downward to the fullest extent a plurality of times as the track member 291'e-. valves, with a tilt of lesser degree between such parts. As the track member 29 is revolled at a different rate of speed than the search light and in the opposite direction, it follows that when the search light reaches a predetermined point in its bodily rotation in a horizontal plane, it may be tilted upward to the fullest extentby one of the crowns or high parts of the wave-like track, but when the search light reaches the same point in the following revolution it will not be tilted to the same extent as in the preceding revolution, but will be either tilted sion or low part on said wave-like track 30, or be tilted to a less extent by a portion of said wave-like track intermediate such high and low parts. The result is that, when both of the shafts 17, 18 are rotated at the same time, but in opposite directions and at different rates of speed, the search light will be caused to throw a beam of light on every oint in the horizon at some time during 1ts operation, but will not illuminate one fixed point twice in succession. A second movement may be accomplished by shiftingone of the clutch members out of engagement with its gear pinion. For example suppose that the clutch member 44 is shifted by the lever 46 out of engagement with the gear pinion 42, so that no motion will be imparted tothe gear wheel 32. Under such conditions, the outer shaft 17 will be rotated by the motor 34, and as the search light 26 is rather heavy inweight', the samewill probably be carried around with the revolving member 29 and will be maintained at a fixed indicatlon, either up or down, depend- 105 downward to the fullest extent by a depresing on where the rollers 31 bear on the track 30. Thus, the inclination of the search light may be fixed beforehand, and then be revolved. bodily about a vertical axis at such fixed inclination.

If a rather light apparatus, such as an electric fan or light display figure, were mounted on the cross-arm 24, the inner shaft 18, under such conditions, might be maintained more or less stationary by the frictional lock between the gear pinion 42 and the gear wheel 32, with the result that such light device would be tilted up and down in a fixed vertical'plane on the horizontal pivot pin 25, due to the fact that the Wave-like track member 29 would be rotated b the outer shaft 17 and that such light evice would not be carried around with said member 29 during the rotation thereof. A third motion may be obtained by throwing in the clutch member 44 and throwing out the clutch member 45, whereupon the motor would not transmit power to the outer shaft 17, but would transmit ower to the inner shaft 18, and thus serve to rotate the search light bodily about a vertical axis with the inner shaft. The search light being heavy in weight would probably carry therewith the member 29, and the degree of inclination of the search light would be fixed, depending upon the position of the rollers 31 on the wave-like track 30. If a rather light device should be mounted on the cross-arm 24, the same under such conditions would in all probability be tilted up and down as the rollers 31 travel over the wave-like track member 29, which in such case would be held against rotation by the lock between the gear pinion 43 and the gear wheel 33. If both clutch members 44, 45 are thrown out, it of course follows that the motor 34 will not impart motion to the inner and outer shafts 18 and 17, and under such conditions the search light 26 may be manually tilted up and down between the fork 27 and may also be manually turned or revolved about a vertical axis andthus be used in the same manner as an ordinary search light.

For supplying electric current to the source of light in the search light casing 26, I provide two insulated conductors or wires 50, 50 extending vertically through the inner shaft 18, which is made hollow for that purpose. As shown in Fig. 1, said Wires are carried upward through the arms of the yoke 27 and into the search light casing through the trunnions 51, which pivot said casing between said arms in the usual manner. Wheel 32 and secured thereto is an annular flange 52. Secured to the outside of said flange are two vertically spaced contact rings 53, 53 insulated from each other and from said flange by an annular insulating ring 54, as shown in Figs. 2 and 3. Bearing Extending downward from the gear against the outer face of each contact ring is a resilient contact member or brush 55, 55. to which is connected a conductor wire 56, the latter leading to a source of electric supply. By the construction described, an electric current is supplied to the source of light in the search light casing 26 during the rotation of the latter about a .vertical axis and during its tilting movements up and down in a vertical plane on the horizontal pivot pin 25 and the other movements that may be imparted to said search light by my device, Furthermore, the construction described prevents the conductor wires 50, 50 from being twisted during the rotation of the search light and in its movements up and down in a vertical plane.

When using a heavy search light, as

shown, and to enable my device to be so 7 operated as to cause the search light to be tilted up and down in a fixed vertical plane and not be carried around with the wavelike track member 29 during its rotation when the inner shaft 18 is disconnected from the motor 34, I provide a stop member 57, which, as shown in Fig. 2, is in the form of a set screw; threaded through the bearing member 16 and adapted to engage the portion of-the inner shaft 18 extending therethrough. In the claims l have used the expression two members adapted to be rotated relatively to each other, and by such expression 1 mean that the cross-arm 24 and any apparatus that it supports constitutes one of such members, while the member 29 constitutes the other of such members.

It will be particularly noted that by the construction described and shown, the rotation of the search light 26 about a vertical axis is caused by ositive mechanical means, whether the search light is rotated in a direction contrary to the direction of the track member 29 or not, thus being able to gain a positive and predetermined movement of the parts and thereby have complete control of such parts under all conditions, and also being able to project a beam of light on every point in the horizon.

A search light when equipped with my device may be used for a number of difi'erent purposes. It may be used at night on patrol boats at sea for detecting the presence of hostile craft, both of the marine and air types, and operated without the constant attendance of a man after once being set in operation. Then again, it may be used in commercial pursuits, as for advertising or displaying purposes. In such uses, it may be placed on the top of store building or in another elevated position and serve asa means for attracting attention to such store. Moreover, it may be placed on the top-of a tall building or tower in a town and serve when operated to attract the attention of people in the surrounding terriand, while I have shown and described in detail one preferred form of my device, yet

it is to be of course understood that the details of construction and arrangement of parts shown may be variously changed and 'modified without departing from the spirit a and scope of my invention, and I do not wish to be limited to the exact details of construction and arrangement of, parts illustrated, except as pointed out in the appended claims.

I claim as my invention:

1. A device of the character described,-

A comprising two members adapted to be rotated relativel being provided to each other, said members with coacting means adapted to effect the tilting of one of said members about an axis transverse to the axes of rotation of said members, and mechanical means for positively rotating each of said members.

2. A device of the character described,

comprising two members adapted to be rotated relatively to each other about coincidingaxes, said members being provided with coacting meansadapted to efiect the tilting of one of said members about an axis trans verse to the axes of rotation of said members, and mechanical means for positively rotating each of said members.

. speed and in opposite directions.

3. A' device of the character described, comprising two members adapted to be rotated relativel to each other, said members being provided with coacting means adapted to efiect the tilting of one of said members about an axis transverse to the axes of rotatation of said members, and mechanical means for positively rotating said members relatively to each other and in opposite directions.

. 4. A device of the character described, comprising two members adapted to be rotated relatively to each other, said members bein provided with coacting means adapted to e ect the tilting of one of said members about an axis transverse to the axes of rot-ation of said members, and mechanical means for positively rotating said members relatively to each other at different rates of 4 5. A device of the character described, comprising ,two members adapted to be' rotated relatively to each other, one of said members being provided with an annular wave-like track andthe other havmg en-l gagement with said track so as to be tilted about an axis transverse to the axes of rotation of said members, and mechanical means for positively rotating each of said members.

6. A device of the character described,

comprising two members adapted to be rotated relatively to each other, one of said members being provided with an annular wave-like track and the other having engagement with said track so as to be tilted about an axis transverse to the axes of rotation of said members, and mechanical means for positively rotating each of said members and in opposite directions.

7. A device of the character described, comprising a tiltably mounted member and an annular member, both being adapted to be rotated relatively to each other, one of said members being provided with a wavelike track and the other of said members being provided with rollers bearing on said track, and mechanical means for lmparting a positive rotation to each of said members.

8. A device of the character described, comprising two concentric shafts, one journaled within the other and adapted to be rotated relatively to each other, a member tiltably mounted on one of said shafts, an

annular member on the other of said shafts and provided with a wave-like track, said tiltably mounted member having rollers bearing on said track, and mechanical means for imparting a positive rotation to each of said shafts.

9. A device of the character described, comprising two concentric shafts, one journaled within the other and'adapted to be rotated relativel to each other, a member tiltably mounte on one of said shafts, an annular member on the other of said shafts and provided with a Wave-like track, said tiltably mounted .member having rollers bearing on said track, each of said shafts being provided with a gear wheel, and means for driving each of said gear wheels.

10. A device of the character described, comprising two concentric shafts journaled one within the other and adapted to be rotated relatively to each other, a member tiltone within the other and adapted for rotation relatively to each other, 'a member tiltably niounted on one of said shafts, an annular member on the other of said shafts and provided wlth a wave-like track, said tiltably llli till

mounted member having rollers bearing against said track, each of said shafts being provided with a gear wheel, a motor, and a train of gearing whereby said motor may drive said gear wheels.

12. A device of the character described, comprising two concentric shafts journaled one within the other and adapted for rotation relatively to each other, a member tiltably mounted on one of said shafts, an annular member on the other of said shafts and provided with a wave-like track, said tiltably mounted member having rollers bearing against said track, each of said shafts being provided with a gear wheel, a motor, and a train of gearingincluding clutches whereby said motor may drive said gear Wheels.

13. A device of the character described, comprising two concentric shafts journaled within each other and adapted to be rotated relatively to each other, a member tiltably mounted on one of said shafts, an annular member on the other of said shafts and provided with a wave-like track, said tiltably mounted member having rollers bearing against said track, each of said shafts being provided with a gear wheel, a motor, a train of gearing connecting-said motor with said gear wheels, a clutch interposed between each gear wheel and said motor, and levers for shifting said clutches.

IA. A device of the character described, comprising two concentric shafts journaled within each other and adapted to be rotated relatively-to each other, a member tiltably mounted on one of said shafts and an annivlar member on the other of said shafts and provided with a wave-like track, said tiltably mounted member having rollers bearing on said track, mechanical means for positively rotating each of said shafts, and means for locking one of said shafts against rotation.

15. A device of the character described, comprising a fixed member, two vertical shafts concentrically arranged and jou-rnaled for relative rotation in said fixed member, a member tiltably mounted on one of said shafts, an annular member on the other of said shafts and provided with a wave-like track, said tiltably mounted member having rollers bearing against said track, a gear wheel on each of said shafts, a gear pinion meshing with each of said gear wheels, shafts for said gear pinions, clutches for connecting said gear pinions with said last named shafts, gear wheels on said last named shafts, and a motor for driving said last named gear wheels.

16. A device of the character described, comprising a fixed member, two vertical shafts concentrically arranged and journaled for relative rotation in said fixed member, a member tiltably mounted on the upper end of one of said shafts, an annular member on the upper end of the other of said shafts and provided with a wave-like track, said tiltably mounted member having rollers bearing on said track, a gear wheel horizontally disposed and secured to the lower end of each of said shafts, a gear pinion meshing with each of said gear wheels, each u gear plnion being mounted on a vertically arranged slraft, a clutch for connecting'each gear pinion with the shaft upon which it is mounted, each of said last named shafts being provided with a worm gear, a motor having a driving shaft extending between said worm gears, and a worm gear pinion on said motor shaft and meshing with each of said worm wheels.

17. A device of the character described, comprising a tiltably mounted member and a rotatably mounted member located below said tiltably mounted member, said members being provided with coacting means adapted to effect the tilting of said tiltably mounted member upon the rotation of said rotatably mounted member, and mechanical means located below said tiltably mounted member for rotating said rotatably mounted member.

In testimony that l claim the foregoing as my invention, ll affix my si ature in the presence of two witnesses, the 13th day of September, A. 1D. 1917.

LOUIS GREENBERG. Witnesses:

EUGENE C. WANN, CLARA L PEOPLES. 

